How many base pairs are present in each full nbsp-turn of the DNA double helix-46810

The correct option is D 1010 nbsp;base pairs are present in each full nbsp;turn of the DNA double helix.The bases are nearly perpendicular to the helix axis ...

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Standard XII

Chemistry

Types of Hydrogen Bonding

How many base...

Question

How many base pairs are present in each full turn of the DNA double helix?

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Solution

The correct option is D 10
10 base pairs are present in each full turn of the DNA double helix.
The bases are nearly perpendicular to the helix axis, and adjacent bases are separated by 3.4 . The helical structure repeats every 34 , so there are 10 bases (= 34 per repeat/3.4 per base) per turn of helix. There is a rotation of 36 degrees per base (360 degrees per full turn/10 bases per turn).

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